General :: SD Card Suddenly Appears As A File

I just plugged my phone into the computer, pushed a file to the sdcard and then unplugged it. When I opened Root Explorer, it didn't default to my sdcard as usual so I opened the built in file manager and it found the card just fine. I checked the /mnt folder and sure enough the sdcard appears in there. /sdcard has always shown in my root directory and has done so up until now. Now, instead of a /sdcard folder, I see a file in the root directory named sdcard. I fear the location change could cause issues (the least of which is tweaking out my OCD).

I didn't do anything out of the ordinary. USB Debugging is enabled, I left the phone in charge only mode, I ran the command "adb push C:directoryfile /sdcard" and it appeared to be successful, I unplugged it without using the "eject" function on the computer. I've done this many many times before and this has never happened to me. I have a Droid X and am running Wizard0f0's MIUI build. Again, none of my steps vary from what I've done before. The computer is the same, the drivers are the same, the location of adb is the same, etc.